Hydraulic shock absorrer



F. BRADY HYDRAULIC SHOCK ABSORBER March 26, 1929.

Filed Feb nt: c:

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Patented Mar.` 26, 1929.

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UNITED PATENT orales.

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The object ofthis invention is to provide af `hyd rauflic shock` ,iabsorlier`v oi" sini-ple, durable, and compact construction, capable of being maiuifacturcl at moderate cost,` haw 5 inglno springs oreirpensive machined parts,

and' which` will, Without necessity` forfadjlustment, absorb` li `ht, and heavy shocks `and rebounds,.bengfat aptedl to `cushion the descent `of" the body when? theA automobile springs @compressL land ito retarchthel upward rebound oithe springs. y l

. My improvementsobviate ,thenecessity of careful machining `and inevorknianship which` is "so necessary to hydraidic shock absorbers'which have been practicalandsuccessfujl..

In my shock absorberthe piston `and cylinder principle, and the fluid metering prin ciple are employed in an improved manner and a novel combination, as Will more fully appear hereinafter.

In the accompanying drawings: Figure l, is a side elevation showing the device in use; i

Fig. 2, is avertical section; and

Fig. 3, is a horizontal section on the lin 3 3, Fig. 2. i

The body l is of elongated, tank-like form, of a` size depending on the car on which the device is to be used.

Rising within the central portion of the body is a stationary piston 2 which is secured to the bottom of the body and is separat-ed from the Walls thereof. This piston,

a1 cylinder 6 of the shape of the piston 2` and telescoping over the latter, and cushioning blades or Wings 7 which preferably lie in the same plane with the bottom of the cylinder and are provided with circular openings 8 which are of a diameter slightly less than that of the cones 3.

The cylinder 6, While open at its bottom,

ribs or guides 4.

While shown as being of general rectangular is closed at its top, and it is guided by thev Thetop 9 has an opening `l() through Which the cylinderG can play, saidtopbeing pro-vided with a stuiiingboxfllthrough which the `cylinder 6 is adapted to move.`

i The top 9 overlies theflange 5, vand pret-` erably has a depending. `flange encircling flange, 5. A` gasket or paclgirng13` is interl posed between the flange 5 and the top E9. and suitable bolts or fasteninfrs 14, areprovided oi `the- ,purpose of; Securing the top to the oy.` i M f Depending from the topv 9 are cones l5 which `are in vertical eliminen-t With the Canes Sendra-11e of the same dmensiens as cones `Beirilg spaced apart `the saine dis# taceas are ,the Cones` 3; thelcones 15"` er@ arranged`vvith their vertical axes coinciding with the vert-ical axes of said cones 3 and they are arranged so that the openings 8 will receive said cones 15 when the cylinder 6 and the vanes or blades 7 rise above the apices of the cones 3.

The apices of the cones 3 are' preferably slightly separated from the apices of the cones 15. The sets of cones constitute, in

`connection With the holes 8, metering devices Which permit the lovv of the liquid through the holes 8, in one direction or the other, according to the up and down movements of the cylinder 6 and the blades 7. It Will be understood, `that the flow of the li uid and the resistance offered to the travel o the blades and piston are proportional to the extent of travel of said piston and blades. That is to say, When the piston and blades descend, the liquid beneath the blades exercises a constantly increasing resistance to their travel. Similarly, when the piston and blades rise, the same result occurs after the blades reach a point of their ascent intermediate the apices of the cones.

Consequently, small irregularities of the road or pavement travelled over arereadily absorbed, Without noticeable effect because, With the blades 7 in their normal position intermediate the apices of the cones, the liquid can easily pass through the holes 8. If the vehicle spring is compressed, instead of the body of the vehicle rapidly descending with a jolt, `it is gently cushioned, with a constantly increasing resistance offered to its descent. On the other hand, the unpleasant rebound action of vehicle sprin is overcome because, as the piston and b ades ascend, the upper cones 15 gradually check the ascent oi the piston and blades.

f nysuitable means may be provided for connecting the l body l tothe axle and any suitablemeans for connecting the piston rod to the spring, the means j shown being i1- lustrative. n

Any suitable oil or liquid may be usedin the body 1. `A suitable oil hole 16 is prof vided in the cover 9 through which the body ma vbe-filled with liquid.

' ny'v light oil ,which is nonffreezable and automobile onuwhich fthe shock absorber is 'ifsefl'and the 10aa m which it will be subjiecred; A y

Wha I @nim is -Y 2 1. In a hydfaune shock absorber, the combination With `a liquid container having'sets of opposingjcones, oiga piston and cylinder located 'between the respective sets' .of cones,

and blades or lvanes movableinthe liquid container'andcarried by the-movable mem-y berE of said piston andcylinder, said blades bination With a liquid container having a fixed piston, of sets of opposing cones located Withinthe container on opposite sides of the piston, a movable cylinder which receives the fixed piston, and blades or vanes projecting in opposite directions from said cylinder and located Within the container, said blades having openings adapted to re- Ceive the cones.

3. In a hydraulic shock absorber, the combination with a liquid container, of a pair of opposing cones located Within. said container, a` piston and cylinder, one member of which is movable and the other member stationary, and an apertured blade or vane carried vby the movable member aforesaid, and adapted to telescope over one or the other of said cones according to its direction of movement.

AIn testimony whereof I affix my signature.

, DELFRED F. BRADY. 

